Roll end fastening

ABSTRACT

APPARATUS FOR PROVIDING FOR THE FASTENING OF THE END OF A ROLL MATERIAL, SUCH AS TOILET AND SIMILAR PAPER ROLLS, IN WHICH THE CONVENTIONAL BED-ROLL, IN ADDITION TO A PIVOTALLY MOUNTED KNIFE BLADE WHICH IS MOUNTED WITHIN THE ROLL AND RECIPROCATES OUT OF THE ROLL TO CUT THE MATERIAL, IN COOPERATION WITH A FURTHER BLADE ON A ROLLER MOUNTED PARALLEL TO AND ADJACENT THE BED-ROLL, ALSO HAS A GLUE APPLICATOR BY MEANS OF WHICH A LOCALIZED SPOT OF GLUE IS APPLIED TO THE MATERIAL A SHORT DISTANCE FROM THE END. MORE THAN ONE SPOT OF ADHESIVE MAY BE APPLIED, SPACED ACROSS THE MATERIAL. THE GLUE MAY BE APPLIED BY A MEMBER WHICH RECIPROCATES WITH THE KNIFE BLADE AND MOMENTARILY PRESSES THE MATERIAL AGAINST THE GLUE APPLICATOR, OR THE GLUE MAY BE EJECTED ONTO THE MATERIAL.

March 2, 1971 HEUFF ETAL ROLL END FASTENING Q'Sheets-Sheet 1 Filed Dec. 20, 1967 INVENTOR a4. I z a PATENT AGENT March 2, 1971 Filed Dec. 20, 1967 M. HEUFF ETA!- ROLL END FASTENING 2 Sheets-Sheet 2 BY yg {Q4 United States Patent O 3,567,552 ROLL END FASTENING Michael Heutf and Pierre A. Bornais, Trois Rivieres, Quebec, Canada, assignors to Consolidated Paper (Bahamas) Limited, Nassau, N.P., Bahamas Filed Dec. 20, 1967, Ser. No. 691,995 Int. Cl. B65h 19/06 US. Cl. 156-468 Claims ABSTRACT OF THE DISCLOSURE Apparatus for providing for-the fastening of the end of a roll of material, such as toilet and similar paper rolls, in which the conventional bed-roll, in addition to a pivotally mounted knife blade which is mounted within the roll and reciprocates out of the roll to cut the material, in cooperation with a further blade on a roller mounted parallel to and adjacent the bed-roll, also has a glue applicator by means of which a localized spot of glue is applied to the material a short distance from the end. More than one spot of adhesive may be applied, spaced across the material. The glue may be applied by a memher which reciprocates with the knife blade and momentarily presses the material against the glue applicator, or the glue may be ejected onto the material.

BACKGROUND OF THE INVENTION Field of the invention The fastening of the ends of rolls of material, particularly ends of paper.

Description of the prior art Previously, ends of rolls have been fastened by glueing all across the end of the roll, or by manually applying a strip of adhesive tape over the end or by embossing the end with indentations, which penetrate several layers of paper to force the layers into intimate contact.

Glueing down the end of a roll, across the width of the roll is very inconvenient when it is desired to start unwinding the roll. It is often necessary to cut across the roll, which is wastefull and a suitable cutting is not always available.'Tearing results in much damaged material.

A strip of adhesive material is an expensive method as labour costs are high. Also, release of the tape is often difiicult.

An example of embossing to fasten the end of a roll is disclosed in US. Pat. No. 2,612,992, issued Oct. 7, 1962. While this is effective for certain materials, it is necessary to provide embossing dies, which are expensive and not all materials are satisfactorily handled. Also, an additional step is required in the overall process.

The present invention provides a simple method of fastening the ends of rolls of material, the ends are easily unfastened as a tab portion is left free. The attachment of the end to the remainder of the roll is only at one or more localized points and is therefore easily broken. The application of the adhesive is at the same time as cutting of the material and no extra labour is required.

SUMMARY The invention is concerned With the application of one or more localized areas of adhesive to the end of a roll of material substantially simultaneously with the cutting of the material on finish of forming a roll. The adhesive is applied a short distance from the cut end, and when the roll is completely wound the adhesive fastens down the end but leaves a short tab sticking up slightly. The end is thus easily and quickly unfastened when necessary. Existing apparatus is easily adapted and no additional labour is required.

3,567,552 Patented Mar. 2, 1971 "ice BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-section through one embodiment, illustratrng a part of a bed-roll and the associated reciprocatmg knife blade and co-operating roll with cutting blade, and a reciprocating member for pressing the material against the glue applicator.

FIG. 2 is a diagrammatic illustration of a roll of material with the adhesive applied, and the end fastened,

FIG. 3 is a cross-section, similar to FIG. 1, of an alternative embodiment, illustrating a different form of glue pp y,

FIG. 4 is a cross-section on the line 44 of FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As seen in FIG. 1, the material indicated at 10, from the slitting, embossing and unwind stand, or some other similar apparatus, is fed to a bed-roll 11. From the bedroll, the material, after cutting, is fed to a rewind section, not shown.

The bed-roll 11 is hollow, and has a portion 12 cut from its peripheral circumference 13. Mounted in the cutout portion is a plate 14. A shaft 15 is pivotally mounted within the bed-roll 11, the axis of the shaft parallel to the axis of rotation of the bed-roll. The shaft 15 is positioned adjacent the periphery of the bed-roll and carries a knife-blade 16 and a back plate 17. The knife-blade 16 and back plate 17 reciprocate, with shaft 15, to project through an opening 18 in the plate 14 positioned in the cut-out portion 12. The shaft 15 is actuated by mechanism, not shown, so that the knife-blade 16 and back plate 17 extend through the opening at a predetermined rotational position of the bed-roll 11.

Positioned adjacent to the outer periphery of the bedroll 11 is a further roll 20. Roll 20 carries a further knifeblade 21. The axis of the roll 20 is parallel to the axis of the bed-roll 11 and rotation of the roll 20 is synchronized so that the two knife-blades 16 and 20 co-operate to cut the material 10. The back plate 17 holds the ends 22 of the material away from the peripheral surface of the bed-roll to facilitate the feeding of the end 22 onto the rewind section. Knife-blade 16 and back plate 17 are mounted on the shaft 15 by a clamp 23 which permits of adjustment of the position of knife-blade 16, backing plate 17, so that the two knife-blades 16 and 21 co-operate correctly.

The above is existing apparatus and it is believed further detailed description is unnecessary.

Turning now to the features of the present invention, there is mounted on the shaft 15, by means of a further clamp 25, a lifter or presser bar 26. The bar 26 has an arcuate surface 27 which, when the bar is extended through the opening 18, lifts the end of the material away from the surface of the bed-roll 11.

Adjacent the peripheral surface of the bed-roll 11 is mounted a glue applicator 30. A variety of glue applicators can be used and the one illustrated is suitable for glues which need to be kept heated. The glue applicator comprises a stationary sleeve 31. Rotatably mounted on sleeve 31 is a sleeve 32 having an enlarged cylindrical portion 33. The portion 33 revolves through a reservoir 34 which holds molten glue. A metering blade 35 controls the thickness of the glue film on the portion 33. The applicator 30 is mounted on a bar 36 extending across the machine and as many applicators as required are mounted on the bar. The sleeve 32 is rotated at a slow speed by drive means, not shown. Positioned within sleeve 31 is an electric heater 37 comprising a heater wire wound on a flexible mandrel.

The periphery of the cylindrical portion 33 is posttioned relative to the periphery of the bed-roll 11 so that,

as the bed-roll rotates, the surface 27 of the bar 26 will press the material into contact with the portion 33. Depending on the axial length of the portion 33, and the shape of the arcuate surface 27, a localized spot or area of glue is applied to the material 10. It will be seen that the glue will be applied a short distance from the cut end of the material for a purpose to be described.

FIG. 2 illustrates a roll of material, for example, a roll of toilet tissue, 40. Two localized areas of glue, 41 and 42, are indicated. As described above, the glue is applied a short distance from the cut end of the paper; and a tab portion 43 is left, which sticks up from the surface of the roll. This provides a quick and easy way for starting the roll as the tab 43 can readily be gripped by the fingers.

The roll 40 is illustrated with two glue areas. This would require two glue applicators 30 positioned apart on bar 36, so as to apply the glue at the desired locations. If a single area of glue would sufiice, then this would probably be at the centre, and only a single applicator would be necessary.

Thus, as so far described, the invention provides a very simple, easy and cheap way of securing or fastening the end of a roll of material. The necessary apparatus can readily be attached to existing apparatus, avoiding expense of additional machinery. No additional labour is necessary. The glue used can be of any suitable type, as long as it can be transferred by a roll or wheel, and have substantially instant tack.

FIG. 1 also illustrates a further feature. Pivotally mounted within the bed-roll 11 is a further shaft 45. The shaft 45 is adjacent the periphery of the bed-roll and its axis of rotation is parallel to the axis of the bed-roll. The shaft 45 carries a carrier member 46, which is clamped to the shaft, and a rubber pad 47 is attached to the carrier member. The shaft 45 is reciprocated in the same manner as shaft at a later rotational position of the roll 11, reciprocation of the. shaft causing the pad 47 to extend in a radial direction through the opening 18 to press the leading edge of material 10 against the core. Glue is applied to the core before winding.

Pins 48 are attached to the back plate 17 and project towards the roll 20. A soft rubber foam pad 49 is attached to the periphery of the roll and the ends of the pins 47 enter the pad 49 and the end of the material is gripped and positively fed forward. The end of material will be pushed onto the pins and will remain on the pins until they are retracted beneath plate 14. This retraction does not occur until well past the cutting position and generaly the pins remain projecting until adjacent the rewind section and assist in feeding the material to this section.

FIG. 2- illustrates an alternative form of arrangement for the supply of glue. The same reference numerals are applied for those items which are the same as in FIG.1.

Thus in FIG. 3, the material 10 is fed to the hollow bed-roll 11. The bed-roll 11 has a cut-out portion 12 in its circumference 13 within which is mounted plate 14. Shaft 15 is pivotally mounted within the bed-roll 11, with its axis parallel to the axis of the bed-roll. The shaft 15 carries a knife-blade 16 and a back plate 17, the knifeblade and back plate reciprocating, with reciprocation of shaft 15, to project through the opening 18 in the plate 14. Also mounted on the shaft 15 by clamp is the presser bar 26, having an arcuate face 27.

Adjacent the outer periphery of the bed-roll 11 is a further roll 20. Roll 20 carries the further knife-blade 2i, which knife-blade cooperates with knife-blade 16'.

As so far described, the arrangement is the same as in FIG. 1. The major difference in the embodiment illustrated in FIGS. 3 and 4 is the apparatus for deliverying, or supplying, glue onto the material 10. I

A glue applicator, indicated generally at 59, applies a spot of glue to the material 10. The form of the applicator 59 will be more readily seen in FIG. 4. The applicator comprises a housing 60 forming a cylindrical chamher 61 within which a piston 62 reciprocates. Piston 62 comprises a metal body 63 with cup leathers 64 providing a pressure seal. The cup leathers 64 are opposed as they are required to seal against pressures on both sides of the piston. A spring 65 urges the piston to its retracted position, against a stop 66. Conveniently, the main body of the applicator is in three parts, the housing 60 and two further hollow cylindrical members 67 and 68. This enables the insertion of the stop 66, which has a clearance from the interior wall of cylindrical member 69, for the flow of pressure fluid, as hereinafter described. At the upper end of the applicator 60 is attached a flexible fluid pressure supply line 69.

Glue is fed to the applicator through a flexible glue supply pipe 70. Supply pipe 70 is connected to the housing 60 by means of an adaptor 71 which contains a oneway ball valve 72. The valve is biased to a closed position by a spring 73, against a flow from supply pipe 70 into the chamber 61.

At the lower end of the housing 60 is an orifice mem her or nozzle 75 having an orifice 76 and which member also contains a one-way ball valve 77. The valve is biased to a closed position by a spring 78, against a flow from the chamber 61.

In operation, a pressure fluid, for example air, is fed via supply line 69 to the housing 60, via members 67 and 68. The pressure fluid pushes down the piston 62 against spring 65. The pressure within the chamber 61, below the piston 62, builds up and forces open the valve 77 and a small amount of glue issues from the orifice 76. On relief of the pressure supply to the housing 61, valve 77 closes and valve 72 opens to let in a new supply of glue into the chamber 61.

Depending upon the characteristics of the glue, the glue can be applied to the material in more than one way. With the arrangement as shown in FIG. 3, with a presser bar 26, the glue is viscous and is expelled through the orifice 76 somewhat slowly. As a result a drop of glue sits on the end of the nozzle 75 and the material is pressed against the nozzle by the presser bar. In an alternative arrangement, the presser bar 26 can be dispensed with and the glue applicator ejects a drop of glue from the nozzle, the drop of glue jumping the gap between nozzle 75 and the bed-roll 11 to hit the material 10. A more fluid glue, and possibly a more rapid application of pressure fluid to the piston 62, would be required.

The application of the fluid pressure to the piston '62 is synchronized with the passage of the knife-blade 16, so that the glue is applied at a correct position on the material. As many applicators as spots of glue, are normally positioned across the bed-roll, although it may be possi ble to apply more than one spot of glue with one applicator.

Depending upon the glue used, heating of the glue supply pipe 70, and the applicator, may be necessary. In a particular example, hot animal glue is used, at a temperature of F, and thus the glue supply pipe, and at least the housing '60, will need to be heated to maintain the glue at the desired temperature.

The position of the applicator 59, relative to the roll 11, both in a direction radial to the roll 11 and in a direction normal to such radial direction, is adjustably maintained by a bracket or support 81.

What is claimed is:

1. In apparatus for cutting the end of a roll of material and including a bed-roll for conveying a web of the material, and having a cut-out portion in the circumferential periphery thereof extending at least the width of the material, a first knife-blade pivotally mounted within the bed-roll for reciprocal movement about an axis parallel to the bed-roll axis, the blade extending parallel to the bed-roll axis and reciprocable from one position wherein the blade extends out of the bed-roll through the cut-out portion, a further roll supported for rotation about an axis parallel to the axis of rotation of the bed-roll and positioned adjacent the periphery of the bed-roll, a further knife-blade on said further roll extending in a radial direction parallel to the axis of rotation of the roll, and means rotating the rolls in synchronism whereby the tWo knife-blades co-operate to cut the material; the improvement comprising means for applying glue at at least one localized area a short distance from the cut end of the material, said means comprising a glue reservoir, glue transfer means on the reservoir, and a pressure member pivotally mounted Within the bed-roll for reciprocal movement about an axis parallel to the axis of the bed-roll, from a first position Within the bed-roll to an extended position 1 outside the bed-roll, through said cut-out portion, to lift the end of the material and press it onto the glue transfer means.

2. In apparatus as claimed in claim 1, said pressure member mounted for reciprocal movement with the knifeblade on the bed-roll.

3. In apparatus as claimed in claim 1, a series of pins extending radially through the cut-out portion of the bedroll, rearwardly of said first knife-blade relative to the direction of rotation of the bed-roll, and a pad of resilient material on the periphery of said further roll positioned to press on the ends of said pins to anchor the web of material to the pins to assist in feeding the material after cutting.

4. In apparatus as claimed in claim 3, means mounting said pins for reciprocation from a first position within said bed-roll to a second position extending from said bedroll.

5. In apparatus for cutting the end of a roll of material and including a bed-roll for conveying a web of the material, and having a cut-out portion in the circumferential periphery thereof extending at least the width of the material, a first knife-blade pivotally mounted within the bed-roll for reciprocal movement about an axis parallel to the bed-roll axis, the blade extending parallel to the bed-roll axis and reciprocable from one position wherein the blade is within the bed-roll to another position wherein the blade extends out of the bed-roll through the cutout portion, a further roll supported for rotation about an axis parallel to the axis of rotation of the bed-roll and positioned adjacent the periphery of the bed-roll, a further knife-blade on said further roll extending in a radial direction parallel to the axis of rotation of the roll, and means rotating the rolls in synchronism whereby the two knife-blades cooperate to cut the material; the improvement comprising means for applying glue at at least one localized area a short distance from the cut end of the material, said means comprising a glue applying member located a fixed distance from the surface of said bed-roll, a shaft carrying said first knife blade for pivotal movement thereof, a pressure member fixed to said shaft and swingable with said first knife blade from a first position within the bed-roll to a second position outside the bedroll through said cut-out portion, said pressure member in said second position being in pressure applying relation to said fixedly located glue applying member.

References Cited UNITED STATES PATENTS 2,768,690 10/1956 Roberts et al. 24256X 3,096,948 7/1963 Conrad, Jr. 242-67.1 3,179,348 4/1965 Nystrand et al. 242-56 3,342,434 9/1967 Conrad, Jr. 24267.1

VERLIN R. PENDEGRASS, Primary Examiner US. Cl. XR 

